Flora of North America species comparison

erect to spreading, green when young, fastigiately branched, glabrous or sparsely hairy, gland-dotted, resinous.

spreading to erect (bushes mostly broader than high), highly branched, green when young, becoming reddish brown, long-stipitate-glandular.

mostly ascending to spreading, older deflexed;

blades filiform (sulcate to concave), 25–90 × 0.5–3 mm, midnerves obscure to evident, apices acuminate to attenuate, often mucronate, faces glabrous or sparsely hairy, gland-dotted (in deep, circular pits), resinous;

axillary leaf fascicles sometimes present.

ascending;

blades oblanceolate, 5–40 × 2–7 mm, midnerves evident, (margins crispate) apices acute, faces long-stipitate-glandular;

fascicles absent or of 1–3 leaves.

1–15 mm (bracts 0–7, scalelike, resembling phyllaries).

2–20(–40) mm (bracts 1–10+, leaflike).

turbinate to subcampanulate, 4–6 × 3.5–4.5 mm.

campanulate, 9–15 × 10–15 mm.

0.

(0–)1–8;

laminae elliptic, 8–14 × 1.5–4 mm.

10–25;

corollas 4–5 mm.

15–40;

corollas 8.5–10.5 mm.

20–25 in 3–4 series, tan, narrowly triangular to lanceolate, 1.5–5 × 0.5–1 mm, unequal, mostly chartaceous, midnerves evident, raised, mostly uniform in width to slightly dilated apically, (margins membranous, fimbriate) apices erect, acute, abaxial faces resinous.

17–31 in 2–3 series, green to tan, lanceolate to obovate, 8–18 × 1–4 mm, subequal, outer herbaceous or herbaceous-tipped, inner chartaceous to herbaceous-tipped, midnerves (+ 2 smaller, collateral nerves) often evident, (margins herbaceous or narrowly membranous, mostly stipitate glandular to fimbriate) apices acute to acuminate, abaxial faces stipitate-glandular.

in rounded, cymiform arrays (to 10 cm wide).

borne singly or (2–3) in (leafy) racemiform arrays (1–4 cm wide).

tan to brown, narrowly turbinate, 2–3 mm (5-ribbed), hairy;

pappi tan, 3.5–4.5 mm.

narrowly turbinate to ellipsoid, 5.5–8 mm, villous;

pappi tan, 7.5–9 mm.

= 18.

= 18.